Cooling unit



FIG. 1 is a perspective view of a cooling unit showing my ornamental design;

FIG. 2 is a front plan view of the cooling unit embodiment shown in FIG. 1;

FIG. 3 is a right side plan view of the cooling unit embodiment shown in FIG. 1;

FIG. 4 is a left side plan view of the cooling unit embodiment shown in FIG. 1;

FIG. 5 is a top plan view of the cooling unit embodiment shown in FIG. 1;

FIG. 6 is a top perspective view of the cooling unit embodiment shown in FIG. 1; and,

FIG. 7 is a partial close-up top plan view of cooling unit embodiment shown in FIG. 1. 

The ornamental design for a cooling unit, as shown and described. 